I've been having a tough time trying to get a grip on how to use primary/secondary currents for turns ratios when the polarity flips. These visual aids with your step-by-step explanation definitely helped clarify! Thanks Zach - your course is by far the best I've come across.
There are so many types of questions that can be asked of auto transformers due to all of the different variables and arrangements. Thanks for clearing it up on this video!
Great video that explains the connection differences between step-up and step-down autotransformers when going from single phase xfmrs to autoxfmrs and explains the the why.
if we have HV side as H1 and H2 , LV side as X1 and X2 , then how does the following jive with what you have done ? a. current in any winding should not exceed its rated current.b. if the current in a winding flows from H1 to H1 then the current in the other winding MUST flow from X2 to X1 and vice versa.c. Voltages add with terminals of opposite polarity are connected to together and subtract if same polarity terminals are connected. PLEASE clarify with thanks !
Calculation shows by connecting the prim and sec windings together, rating is to increase. However, I am always concerned about the transformer terminal rating. Two individual Windings loading is not changed. But the current flows into/out of the winding through the terminals which are the exposed parts. The terminals are just rated to the original current before the transformer got rewired to become auto transformer. Is this problem just a theoretical problem instead of practical problem? You don't want to overheat the transformer terminals after it becomes auto transformer.
Mostly just a theoretical problem, since auto-transformers are built with windings that are rated for the correct amperage and temperature. However if you were to re-arrange a standard single-phase transformer into an auto-transformer like the example in this video you are correct that you would need to make sure that the conductors and insulation would be able to handle the greater power output.
I've been having a tough time trying to get a grip on how to use primary/secondary currents for turns ratios when the polarity flips. These visual aids with your step-by-step explanation definitely helped clarify! Thanks Zach - your course is by far the best I've come across.
Yet another thorough video going through a complex topic. This helped immensely in understanding the concept of autotransformers!
There are so many types of questions that can be asked of auto transformers due to all of the different variables and arrangements. Thanks for clearing it up on this video!
Explained well both visually and verbally
Before this video i had very hard time understanding the auto transformers. Thanks Zach
Great video that explains the connection differences between step-up and step-down autotransformers when going from single phase xfmrs to autoxfmrs and explains the the why.
Well explained on how to get the new auto transformer ratio!
Thanks Julius, glad you enjoyed.
Well explained, sir. Thank you!
Glad it helped
if we have HV side as H1 and H2 , LV side as X1 and X2 , then how does the following jive with what you have done ? a. current in any winding should not exceed its rated current.b. if the current in a winding flows from H1 to H1 then the current in the other winding MUST flow from X2 to X1 and vice versa.c. Voltages add with terminals of opposite polarity are connected to together and subtract if same polarity terminals are connected. PLEASE clarify with thanks !
Calculation shows by connecting the prim and sec windings together, rating is to increase. However, I am always concerned about the transformer terminal rating. Two individual Windings loading is not changed. But the current flows into/out of the winding through the terminals which are the exposed parts. The terminals are just rated to the original current before the transformer got rewired to become auto transformer. Is this problem just a theoretical problem instead of practical problem? You don't want to overheat the transformer terminals after it becomes auto transformer.
Mostly just a theoretical problem, since auto-transformers are built with windings that are rated for the correct amperage and temperature. However if you were to re-arrange a standard single-phase transformer into an auto-transformer like the example in this video you are correct that you would need to make sure that the conductors and insulation would be able to handle the greater power output.
sorry I meant not H1 to H1 but H1 to H2 - my typo!